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NOTE:
The 2004 JR 2.0L/2.4L all and the 2.7L late
launch are equipped with the Powertrain
Control Module and Transmission Control
Module combined in a single control module.
This
module
is
Controller (NGC) for DaimlerChrysler and will
be referred to as the Powertrian Control
Module (PCM).
The PCM has four color coded connectors C1
through C4, (C1 - BLK, C2 - ORANGE C3 -
WHITE, C4 - GREEN), with each connector
containing 38 pins.
Two tools are required to diagnose and repair
the PCM terminals and harness connectors:
1. Miller #3638 Terminal Removal Pick must
be
used
to
release
terminals or harness and connector
damage will occur.
2. Miller #8815 Pinout Box must be used to
probe the PCM terminals or terminal
damage will occur.
1.0 INTRODUCTION
The procedures contained in this manual include
specifications, instructions, and graphics needed to
diagnose the PCM Powertrain System. The diag-
nostics in this manual are based on the failure
condition or symptom being present at time of
diagnosis.
Please follow the recommendations below when
choosing your diagnostic path.
1. First make sure the DRBIII is communicating
with the appropriate modules; ie., if the DRBIII
displays a No Response condition, you must
diagnose this first before proceeding.
2. Read DTC's (diagnostic trouble codes) with the
DRBIII .
3. If no DTC's are present, identify the customer
complaint.
4. Once the DTC or customer complaint is identi-
fied, locate the matching test in the Table of
Contents and begin to diagnose the symptom.
All component location views are in Section 8.0.
All connector pinouts are in Section 9.0. All system
schematics are in Section 10.0.
An * placed before the symptom description indi-
cates a customer complaint.
When repairs are required, refer to the appropri-
ate service information for the proper removal and
repair procedure.
the
Next
Generation
the
connector
GENERAL INFORMATION
Diagnostic procedures change every year. New
diagnostic systems may be added; carryover sys-
tems may be enhanced. READ THIS DIAGNOSTIC
INFORMATION BEFORE TRYING TO DIAG-
NOSE A VEHICLE CODE. It is recommended that
you review the entire diagnostic information to
become familiar with all new and changed diagnos-
tic procedures.
If you have any comments or recommendations
after reviewing the diagnostic information, please
fill out the form in the back of the book and mail it
back to us.
1.1 SYSTEM COVERAGE
This diagnostic procedures manual covers the
2004 JR vehicle equipped with the following en-
gines and powertrain control modules:
•
2.0L/2.4L (NGC) all
•
2.7L (NGC) Late Launch
•
2.7L (SBEC=Driveability-Gas) Early Launch
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the powertrain control module
(PCM) is done in six basic steps:
•
verification of complaint
•
verification of any related symptoms
•
symptom analysis
•
problem isolation
•
repair of isolated problem
•
verification of proper operation
2.0 IDENTIFICATION OF
SYSTEM
The Powertrain Control Module (PCM) monitors
and controls:
•
Fuel System
•
Idle Air Control System
•
Ignition System
•
Charging System
•
Speed Control System
•
Cooling system
1
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